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A low normal testosterone level may increase your risk of dying from a heart attack. 126 men who were admitted to the intensive care unit for fresh heart attacks had their testosterone levels evaluated. These men were then followed for the next 30 days to see how they did. 16 men died, and 110 men survived. However, 100% of the men who died had testosterone levels in the bottom 25 percentile of the normal range. Their testosterone was not low. In fact, it was within a range in which there are a few American doctors who would recommend testosterone supplementation, but everyone who died was within that low normal range. Once more, we have good evidence that being normal is not enough. Where you are within the normal range can make the difference in living and dying. As I keep saying, normal is not acceptable. Shoot for optimal.